Improvement in sash-holders



EQP. MASTEBSON.

Sash-Holders.

Patented May 26,1874.

NI'IED STATES PATENT Grrrcn.

ELIAS I MASTERSON, OF PORT JE RVIS, NEW. YORK, ASSIGNOR OF ONE- IIALFHIS RIGHT TO AUSTIN BENSON, OF SAME PLACE.

VIMPROVEMENT IN SASH-HOLDERS.

Specification forming part of Letters Patent No. 151,233, dated May 26,1874; application filed May 1,1874.

in g a part of this specification.

My invention relates to that class of sashholders known as eccentrics.It has for its object to provide for the retention of the sash at anyaltitude, and also to provide a perfect lock to prevent the elevation ofthe sash when it is undesirable. My invention consists of a reversiblecam or eccentric, trnnnioned to its frame, and adapted to make almost acomplete revolution, held and actuated in-either posi tion by a singlecoiled spring, as will be hereinafter more fully set forth.

To enable those skilled to fully understand the same, I will proceed todescribe the con struction and operation, referring by letters to theaccompanying drawings, in which- Figure l is a detail elevation of aframe and sash with my improved lock attached, the frame being shown invertical section, exposing the back side of the lock; and Fig. 2 is ahorizontal section at the line .00 w of Fig. 1. Similar letters indicatelike parts in both views.

A is the sash, and B is the frame, the latter being rabbeted, as usual,to receive the sash. The frame is also cut away or mortised, as clearlyshown in Fig. 1, at O, to receive the frame D, containin g theeccentric, spring, and operating-disk, so that the cam or eccentric willproject into the rabbet and impinge against the sash-edge. The frame ishalved, as seen at D D, Fig. 2, each having a projecting ledge, E, sothat when placed in position to be secured together by screws or rivetsa a, a suitable space is formed to contain the eccentric F, which isprovided with a suitable hub, 11 l), journaled in the frame D D. Thishub is adapted to receive a square spindle of the operating-disk Gr,located in a countersunk seat on the outside of one half Case 0.

its greatest diameter shall be transverse to the movement of the sash.

From the foregoing description of the parts, it will be readilyunderstood that they may all (except the spring) be easily cast andquickly put together, the operating-disk being the only loose part,which may be put in position prior to introducing the lock to its placein the frame of the window.

The operation is as follows: The lock being in position and the sashdown, as seen in Fig. 1, the tendency of the spring is to force theserrated periphery of the eccentric against the edge of the sash. Thesash may now be raised, which forces the eccentric back into the caseand out of the way; but as soon as the sash is released its weightcauses the teeth of the eccentric to take hold, and the result isobvious, thus holding the sash firmly at such altitude as it wasreleased. In order, therefore, to lower it, the eccentric must be held'back out of the way. This is accomplished through the medium of theoperating-disk, (which is slightly-exposed, as seen at Fig. 2,) byturning it in the direction of the arrow, Fig. 1, when the sash may bedropped to any desired point, or all the way down. It now being desiredto securely lock the sash down, the operating-disk is turned as before,except to a greater extent, or until the teat on the hub of theeccentric has passed the dead-point, or lies on the opposite side of thecenter to that shown in Fig. 1, the spring yielding for this movement.The teeth of the eccentric will new project below the center and impingeagainst the sash, so that any effort to raise the sash will produce thesame effect as the lowering of the sash would when the eccentric is inthe reverse position. It will also be observed that the eccentric isenabled to make almost a complete revolution adapted to operatesubstantially in the manon its axis, which may be made substantial, nerand. for the purpose set forth. to bear great strain, which is veryimportant. Witness my hand and seal this 28th day of I do not, however,claim this of itself but April, 1874.

What I claim as new, and desire to secure by Letters Patent, is-MASTERSON' In combination with a suitable frame, the Witnesses:

reversible eccentric F, secured therein by A. E. BENSON,

trunnion-bearings (adapted to receive a suit- R. E. LEE,

able key) and the single coiled spring H, all E. O. MAPLEDORE.

